<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>

        <el-card class="box-card">
            <el-row>
                <el-col>
                    <el-button type="primary" @click="showAddateDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <el-row>
                <tree-table class="treeTable" :data="catelist" :columns="columns" :selection-type='false' :expand-type='false' show-index index-text="#" border :show-row-hover='false'>
                  <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen;"></i>
                    <i class="el-icon-error" v-else  style="color: red;"></i>
                  </template>
                  <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level ===0">一级</el-tag>
                    <el-tag type="success" size="mini" v-else-if="scope.row.cat_level ===1">二级</el-tag>
                    <el-tag type="warning" size="mini" v-else>三级</el-tag>
                  </template>
                  <template slot="opt" >
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                  </template>
                </tree-table>
                <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="querInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="querInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total">
                </el-pagination>
            </el-row>
        </el-card>
        <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" :rules="addCateFormRules" @close="addCateDialogClosed" >
          <el-form ref="addCateFormRef" :model="addCateForm" label-width="100px" :rules="addCateFormRules" >
            <el-form-item label="分类名称：" prop="cat_name">
              <el-input v-model="addCateForm.cat_name"></el-input>
            </el-form-item>
            <el-form-item label="父级分类：" >
              <el-cascader  :options="parantCatList" expand-trigger='hover' :props="parantprop" v-model="selectedKeys" @change="parentCateChanged" clearable change-on-select ></el-cascader>
            </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="addCateDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addCate">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      catelist: [],
      total: 0,
      columns: [{
        label: '分类名称',
        prop: 'cat_name'
      }, {
        label: '是否有效',
        type: 'template',
        template: 'isok'
      }, {
        label: '排序',
        type: 'template',
        template: 'order'
      }, {
        label: '操作',
        type: 'template',
        template: 'opt'
      }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      parantCatList: [],
      selectedKeys: [],
      parantprop: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.querInfo })
      if (res.meta.status !== 200) return this.$message.error('获取出错')
      console.log(res.data)
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    showAddateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) return this.$message.error('获取父级列表出错')
      console.log(res.data)
      this.parantCatList = res.data
    },
    parentCateChanged () {
      console.log(this.selectedKeys)
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate () {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功！')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    }

  }

}
</script>

<style lang="less" scoped>

</style>
